[Users] how to handle "488 Not Acceptable Here"

[Richard Bennett]

hi,

When calling from Sipura to softphone (either SJphone or the sip client in my 
e61 nokia phone), with the Sipura set to 
Prefered codec: g723
Use prefered codec only: no
and the softphone only supporting g711, I get this reply from the softphone:

U xxxx:11474 -> xxxxx:5060
SIP/2.0 488 Not Acceptable Here.
Via: SIP/2.0/UDP xxxx;branch=z9hG4bK23e.248c6cd1.1,SIP/2.0/UDP 
xxxx:10001;branch=z9hG4bK-3e8ce192;rport=10001.
To: <sip:1 at test.com>;tag=ujk6mpqhbhhc6kj68irr.
From: sipura line1 <sip:2 at test.com>;tag=d0404120874d710eo0.
Call-ID: e5052808-575f7746 at 192.168.1.52.
CSeq: 102 INVITE.
Warning: 304 192.168.1.3 Media type not available.
Content-Length: 0.

the invite was:

 U xxxx:5060 -> xxxx:11474
INVITE sip:1 at test.co SIP/2.0.
Record-Route: <sip:xxxx;lr=on;ftag=d0404120874d710eo0>.
Via: SIP/2.0/UDP xxxx:branch=z9hG4bK23e.248c6cd1.1.
Via: SIP/2.0/UDP xxxx:10001;branch=z9hG4bK-3e8ce192;rport=10001.
From: sipura line1 <sip:2 at test.com>;tag=d0404120874d710eo0.
To: <sip:1 at test.com>.
Call-ID: e5052808-575f7746 at 192.168.1.52.
CSeq: 102 INVITE.
Max-Forwards: 69.
Contact: sipura  line1 <sip:2 at xxx:10001>.
Expires: 240.
User-Agent: Sipura/SPA2002-3.1.5.
Content-Length: 419.
Allow: ACK, BYE, CANCEL, INFO, INVITE, NOTIFY, OPTIONS, REFER.
Supported: x-sipura.
Content-Type: application/sdp.
.
v=0.
o=- 36143 36143 IN IP4 xxxx.
s=-.
c=IN IP4 xxxxxx.
t=0 0.
m=audio 62238 RTP/AVP 4 0 2 8 18 96 97 98 100 101.
a=rtpmap:4 G723/8000.
a=rtpmap:0 PCMU/8000.
a=rtpmap:2 G726-32/8000.
a=rtpmap:8 PCMA/8000.
a=rtpmap:18 G729a/8000.
a=rtpmap:96 G726-40/8000.
a=rtpmap:97 G726-24/8000.
a=rtpmap:98 G726-16/8000.
a=rtpmap:100 NSE/8000.
a=rtpmap:101 telephone-event/8000.
a=fmtp:101 0-15.
a=ptime:30.
a=sendrecv.

If I set prefered codec to g711 on the Sipura it works normally.
What is the best way to handle this on the sip proxy?

Thanks,

Richard